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Nonprofit · EIN 36-6110212

WINNETKA HISTORICAL SOCIETY

Tax-exempt · WINNETKA, IL 60093

Financials

$290K$348K2023$353K$363K2024$344K$389K2025
Revenue Expenses · by fiscal year end
Financials of WINNETKA HISTORICAL SOCIETY by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990$343,899$389,228-$45,329$1,178,929$8,467$1,170,462
December 31, 2024990$353,189$363,441-$10,252$1,216,462$4,787$1,211,675
December 31, 2023990$289,794$347,952-$58,158$1,228,128$6,201$1,221,927
Financial details: 990 for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$305,146
Program service revenue
$32,345
Investment income
$6,052
Net income from sales of inventory
$356
Other revenue
$356

Expenses

Grants and similar amounts paid
$0
Salaries, compensation and benefits (total)
$160,791
Professional fundraising fees
$0
Occupancy
$5,996
Depreciation
$47,859
Program services (functional)
$287,539
Management and general (functional)
$63,387
Fundraising (functional)
$38,302

Balance sheet and other

Total assets, start of year
$1,216,462
Total assets, end of year
$1,178,929
Total liabilities, end of year
$8,467
Net assets, end of year
$1,170,462
Land, buildings and equipment
$913,246
Net assets without donor restrictions
$1,170,462
Gross receipts
$343,899
Employees
3
Volunteers
25
Year formed
1932
State of legal domicile
IL

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990 for the year ended December 31, 2025, highest compensation first.

NameTitleHours / weekCompensation
MARY TRIESCHMANNEXECUTIVE DIRECTOR
Key employee
24$70,407
MEAGAN MCCHESNEYCURATOR
Key employee
40$69,083
JENNIFER MILLERADMIN ASSISTANT
Key employee
22$9,876
HOLLY MARIHUGHDIRECTOR
Trustee or director
3$0
CARRIE HOZAPRESIDENT
Trustee or director, Officer
3$0
SUSAN SULLIVANSECRETARY
Trustee or director, Officer
3$0
PETER TYORTREASURER
Trustee or director, Officer
3$0
HELEN WEAVERDIRECTOR
Trustee or director
6$0
JIM CARROLLDIRECTOR
Trustee or director
3$0
PAIGE DOOLEYDIRECTOR
Trustee or director
3$0
JAMES HERRMANNDIRECTOR
Trustee or director
3$0
TOM FLEMMADIRECTOR
Trustee or director
3$0
BRAD MCLANEVICE PRESIDENT
Trustee or director, Officer
3$0
PETER TYORDIRECTOR
Trustee or director
3$0
KAREN VORWALDDIRECTOR
Trustee or director
3$0
6 more people on this return
NameTitleHours / weekCompensation
KRISTEN KLEINOPSDIRECTOR
Trustee or director
3$0
MARY WESTERMANDIRECTOR
Trustee or director
3$0
BOB MARRENDIRECTOR
Trustee or director
3$0
JOANNE HUDSONDIRECTOR
Trustee or director
3$0
MARIS ROSENFELDPROGRAM COORDINATOR
Key employee
16$0
KARIS BAKERADMIN ASSISTANT
Key employee
16$0
990 for the year ended December 31, 2024: 19 people
NameTitleHours / weekCompensation
MARY TRIESCHMANNEXECUTIVE DIRECTOR
Key employee
24$63,841
MEAGAN MCCHESNEYCURATOR
Key employee
40$60,654
JENNIFER MILLERADMIN ASSISTANT
Key employee
22$27,235
HOLLY MARIHUGHPRESIDENT
Officer
3$0
CARRIE HOZAVICE PRESIDENT
Officer
3$0
SUSAN SULLIVANSECRETARY
Officer
3$0
HELEN WEAVERTREASURER
Officer
6$0
JIM CARROLLDIRECTOR
Trustee or director
3$0
PAIGE DOOLEYDIRECTOR
Trustee or director
3$0
JAMES HERRMANNDIRECTOR
Trustee or director
3$0
TOM FLEMMADIRECTOR
Trustee or director
3$0
BRAD MCLANEDIRECTOR
Trustee or director
3$0
PETER TYORDIRECTOR
Trustee or director
3$0
KAREN VORWALDDIRECTOR
Trustee or director
3$0
KRISTEN KLEINOPSDIRECTOR
Trustee or director
3$0
MARY WESTERMANDIRECTOR
Trustee or director
3$0
BOB MARRENDIRECTOR
Trustee or director
3$0
MARIS ROSENFELDPROGRAM COORDINATOR
Key employee
16$0
KARIS BAKERADMIN ASSISTANT
Key employee
16$0
990 for the year ended December 31, 2023: 20 people
NameTitleHours / weekCompensationFrom related orgs
MARY TRIESCHMANNEXECUTIVE DIRECTOR
Key employee
24$0$61,501
MEAGAN MCCHESNEYCURATOR
Key employee
40$0$55,764
JENNIFER MILLERADMIN ASSISTANT
Key employee
24$0$23,254
KARIS BAKERADMIN ASSISTANT
Key employee
16$0$7,580
MARIS ROSENFELDPROGRAM COORDINATOR
Key employee
16$0$5,171
HOLLY MARIHUGHPRESIDENT
Officer
3$0$0
CARRIE HOZAVICE PRESIDENT
Officer
3$0$0
JOAN EVANICHSECRETARY
Officer
3$0$0
HELEN WEAVERTREASURER
Officer
6$0$0
JIM CARROLLDIRECTOR
Trustee or director
3$0$0
SUSAN SULLIVANDIRECTOR
Trustee or director
3$0$0
PAIGE DOOLEYDIRECTOR
Trustee or director
3$0$0
JAMES HERRMANNDIRECTOR
Trustee or director
3$0$0
TOM FLEMMADIRECTOR
Trustee or director
3$0$0
TIM RINGDIRECTOR
Trustee or director
3$0$0
PETER TYORDIRECTOR
Trustee or director
3$0$0
KAREN VORWALDDIRECTOR
Trustee or director
3$0$0
KRISTEN KLEINOPSDIRECTOR
Trustee or director
3$0$0
MARY WESTERMANDIRECTOR
Trustee or director
3$0$0
BOB MARRENDIRECTOR
Trustee or director
3$0$0

Address and contacts

Address (IRS master file)
PO BOX 365, WINNETKA, IL 60093-0365
In care of
% MURRAY KRUGMAN
Principal officer (990 for 2025)
HELEN WEAVER, 411 LINDEN AVE, WINNETKA, IL 60093
Signed the 990
PETER TYOR, TREASURER
Phone
(847) 446-0001
Return prepared by
M P KRUGMAN & CO

Mission

PROVIDING HISTORICAL INFORMATION & RESEARCH MAINTAINING, PRESERVING & DISPLAYING HISTORICAL LANDMARKS & ARTIFACTS

990 for the year ended December 31, 2025

Program accomplishments

  • PROVIDING HISTORICAL INFORMATION & RESEARCH MAINTAINING, PRESERVING & DISPLAYING HISTORICAL LANDMARKS & ARTIFACTS
    Expenses $287,539 · revenue $206,116

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026990 on file
2024December 31, 2024May 15, 2025990 on file
2023December 31, 2023May 15, 2024990 on file

IRS record

EIN
36-6110212
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (509(a)(2))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
1955
Accounting year ends
December
Files
Form 990 or 990-EZ
Assets (IRS master file)
$1,178,929
Income (IRS master file)
$343,899

Filing history

FormYear endedRevenueExpensesAssetsReturn
990December 2025$343,899$389,228$1,178,929XML
990December 2024$353,189$363,441$1,216,462XML
990December 2023$289,794$347,952$1,228,128XML
990December 2022$335,453$342,150$1,285,050IRS
990December 2021–––IRS
990December 2020–––IRS
990December 2019–––IRS

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 36-6110212).

Questions about WINNETKA HISTORICAL SOCIETY

What is the EIN of WINNETKA HISTORICAL SOCIETY?
The employer identification number (EIN) of WINNETKA HISTORICAL SOCIETY is 36-6110212.
Is WINNETKA HISTORICAL SOCIETY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1955.
Are donations to WINNETKA HISTORICAL SOCIETY tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does WINNETKA HISTORICAL SOCIETY file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of WINNETKA HISTORICAL SOCIETY due?
The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did WINNETKA HISTORICAL SOCIETY last file with the IRS?
The latest return in the IRS public files is the 990 for the year ended December 2025.
Who is the principal officer of WINNETKA HISTORICAL SOCIETY?
The 990 for the year ended December 31, 2025 names HELEN WEAVER.
Who are the officers and directors of WINNETKA HISTORICAL SOCIETY?
The 990 for the year ended December 31, 2025 lists 21 people; 3 received compensation from the organization, the highest $70,407 (MARY TRIESCHMANN, EXECUTIVE DIRECTOR).
How much revenue does WINNETKA HISTORICAL SOCIETY have?
On its 990 for the year ended December 31, 2025 it reported revenue of $343,899, expenses of $389,228 and total assets of $1,178,929 at year end.

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